Easy-to-disassemble connecting rod with cam structure

ABSTRACT

An easy-to-disassemble connecting rod with a cam structure includes a connecting rod and cams. Two ends of the connecting rod are hinged with the cams. An outer side surface of each cam includes an arc surface, a radius of curvature of the arc surface of each cam around a shaft hole gradually increases, and rotation directions of the two cams are opposite. The technical effects achieved are as follows: in the easy-to-disassemble connecting rod with a cam structure provided by the connecting rod, two ends of the rod contact with the supporting surface via the cams, the pressure on the wall is increased or decreased via radius change caused by rotation of the cams, and further the friction force is increased or decreased, so as to achieve safe and rapid installation or disassembly.

CROSS REFERENCE TO THE RELATED APPLICATIONS

This application is based upon and claims priority to Chinese PatentApplication No. 202121417798.1, filed on Jun. 24, 2021, the entirecontents of which are incorporated herein by reference.

TECHNICAL FIELD

The present application relates to the technical field of householdtools, and in particular to an easy-to-disassemble connecting rod with acam structure, which is suitable for household use horizontal bars andclothes rails mounted on the door frame or between two walls.

BACKGROUND

Household fitness horizontal bars and clothes rails mounted on the doorframe or between the two walls are generally supported by upward forcesgenerated by the friction between the soft rubber at two ends and thewall surfaces. The greater the pressure on the wall, the greater thefriction. The pressure on the wall of the current product on the marketderives from adjustment of the length of the product itself and from theinclined surfaces at two ends. The pressure provided by adjusting thelength of the product itself is very small, and as time goes by, thepressure may gradually decrease, and the friction force may alsodecrease accordingly, resulting in fall of the product. The structure ofinclined surfaces at two ends may continuously generate pressure on thewall or door frame via the downward force exerted on the product, sothat the product is not easy to fall off, and is not easy to mount ordisassemble either. The lateral tolerance provided by the inclinedsurface itself is very small, and to install the product, the length ofthe product is required to perfectly match with the wall or the doorframe, exerting a pre-pressure on the door frames and the walls on twosides. To remove the product, it is required to adjust the length of theproduct.

SUMMARY

To this end, an easy-to-disassemble connecting rod with a cam structureis provided according to the present application to solve theabove-mentioned problems in the conventional technology.

In order to achieve the above object, the following technical solutionsare provided according to the present application.

According to an aspect of the present application, aneasy-to-disassemble connecting rod with a cam structure is provided,which includes a connecting rod and cams. Two ends of the connecting rodare hinged with the cams. An outer side surface of each cam includes anarc surface, a radius of curvature of the arc surface of each cam arounda shaft hole gradually increases, and rotation directions of the twocams are opposite.

Further, a shaft hole is defined on each cam, and two ends of theconnecting rod are each provided with a rotating shaft, the shaft holeof each cam is fitted on the corresponding rotating shaft, and each camrotates around the corresponding rotating shaft.

Further, a distance between an edge point on the arc surface of each camand the center of the corresponding shaft hole gradually increases alongthe rotation direction of this cam.

Further, each cam has an involute shape.

Further, the arc surface of each cam is made of non-slip material.

Further, the arc surface of each cam is provided with a gear surface.

Further, the gear surface of each cam is configured to abut against awall supporting surface, and the wall supporting surface is providedwith tooth grooves adapted to the gear surface of the cam.

Further, each rotating shaft is connected with a connecting cap, and theconnecting cap is nested on the connecting rod.

The present application has the following advantages. In theeasy-to-disassemble connecting rod with a cam structure provided by thepresent application, two ends of the rod contact with the supportingsurface via the cams, the pressure on the wall is increased or decreasedvia radius change caused by the rotation of the cams, and further thefriction force is increased or decreased, so as to achieve safe andrapid installation or disassembly.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to illustrate the technical solutions in the embodiments of thepresent application or in the conventional technology more clearly, thedrawings referred to for describing the embodiments or the conventionaltechnology are briefly described below. It is apparent that the drawingsin the following description are only exemplary. For those of ordinaryskill in the art, other implementation drawings can be derived from theprovided drawings without any creative work.

The structure, proportion, and size shown in the specification are onlyused to match the contents disclosed in the specification for thoseskilled in the art to understand and read and are not intend to limitthe conditions under which the present application can be implemented,having no technically significance. Any modification of structure,change of proportional relationship, or adjustment of size should stillfall within the scope of the technical content disclosed in the presentapplication without affecting the efficacy and purpose of the presentapplication.

FIG. 1 is a structural view of an easy-to-disassemble connecting rodwith a cam structure provided by embodiments of the present application;and

FIG. 2 is a structure view of the cam of the easy-to-disassembleconnecting rod with a cam structure provided by embodiments of thepresent application.

In the drawings: 1 connecting rod, 2 cam, 3 shaft hole, 4 wallsupporting surface.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The embodiments of the present application are illustrated below by thespecific embodiments. Those familiar with this technology can easilyunderstand other advantages and effects of the present application fromthe contents disclosed in this specification. It is apparent that thedescribed embodiments are only some rather than all of the embodimentsof the present application. Based on the embodiments of the presentapplication, all other embodiments obtained by those having ordinaryskill in the art without creative work shall fall within the protectionscope of the present application.

As shown in FIG. 1 and FIG. 2 , in an embodiment according to a firstaspect of the present application, an easy-to-disassemble connecting rodwith a cam structure includes a connecting rod 1 and cams 2. Two ends ofthe connecting rod 1 are hinged with the cams 2. An outer side surfaceof each cam 2 includes an arc surface, a radius of curvature of the arcsurface of each cam 2 around a shaft hole gradually increases, androtation directions of the two cams 2 are opposite.

It should be noted that in this embodiment, a distance between theconnecting rod 1 and a wall supporting surface 4 can be readily changedby means of the cams 2, providing a connecting rod structure that issafe and easy to install or disassemble. When the connecting rod 1 isinstalled, the connecting rod 1 is pulled down, the cams 2 rotate, aradius of curvature at the contact between each cam 2 and the wallsupporting surface 4 becomes larger, the pressure on the wall supportingsurface 4 also increases, and the friction force generated alsoincreases. The greater the downward force, the greater the pressure onthe wall supporting surface 4, and the greater the friction force,thereby achieving quick and safe installation. When the connecting rod 1is disassembled, the connecting rod 1 is lifted up, the cams 2 rotatereversely, and the radius of curvature at the contact between each cam 2and the wall supporting surface 4 becomes smaller, so that the cams 2are separated from the wall supporting surface 4, and the connecting rod1 is removed.

The technical effects achieved by the above embodiment are as follows.In the easy-to-disassemble connecting rod with a cam structure of thepresent embodiment, two ends of the rod contact with the supportingsurface via the cams 2, the pressure on the wall is increased ordecreased via radius change caused by rotation of the cams 2, andfurther the friction force is increased or decreased, so as to achievesafe and rapid installation or disassembly.

In an embodiment, as shown in FIG. 1 to FIG. 2 , in some embodiments, ashaft hole 3 is defined on each cam 2, and two ends of the connectingrod 1 are each provided with a rotating shaft, the shaft hole 3 of eachcam 2 is fitted on the corresponding rotating shaft, and each cam 2rotates around the corresponding rotating shaft.

In the above optional embodiments, it should be noted that, the shafthole 3 is preferably a round hole, and the rotating shaft is preferablya round shaft.

The beneficial effects of the above optional embodiments are as follows:through the shaft hole 3 defined on each cam 2, the flexibility of therotation of the cam 2 is significantly improved.

Preferably, as shown in FIG. 1 to FIG. 2 , in some embodiments, adistance between an edge point on the arc surface of each cam 2 and thecenter of the corresponding shaft hole 3 gradually increases.

The beneficial effects of the above optional embodiments are as follows:through the above arrangement, it is ensured that the friction betweeneach cam 2 and the wall supporting surface 4 is continuously increasedduring the rotation of the cams 2, thereby enhancing the fixing strengthof the connecting rod 1; and when the cams 2 rotate reversely, thedistance between the surface of each cam 2 and the wall supportingsurface 4 is reduced, thereby facilitating the removal of the connectingrod 1.

Optionally, as shown in FIG. 1 to FIG. 2 , in some embodiments, each cam2 has an involute shape.

In the above optional embodiments, it should be noted that, each cam 2may have a structure that can continuously increase the friction betweenthe connecting rod 1 and the wall supporting surface 4.

The beneficial effects of the above optional embodiments are as follows:through the above arrangement, the processing of the connecting rod issimple and the manufacturing cost thereof is significantly reduced.

Optionally, as shown in FIG. 1 to FIG. 2 , in some embodiments, the arcsurface of each cam 2 is made of non-slip material.

In the above optional embodiments, it should be noted that, for example,a non-slip rubber is provided on the surface of each cam 2.

The beneficial effects of the above optional embodiments are as follows:by means of the cams 2 made of non-slip material, the friction betweeneach cam 2 and the wall supporting surface 4 is significantly improved.

Optionally, as shown in FIG. 1 to FIG. 2 , in some embodiments, the arcsurface of each cam 2 is provided with a gear surface, therebyincreasing friction.

In the above optional embodiments, it should be noted that, granular orstriped anti-skid protrusions may also be provided on the surface ofeach cam 2.

Optionally, as shown in FIG. 1 to FIG. 2 , in some embodiments, the gearsurface of each cam 2 abuts against the wall supporting surface 4, andthe wall supporting surface 4 is provided with tooth grooves adapted tothe gear surface of the cam 2.

The beneficial effects of the above optional embodiments are as follows:by providing a gear surface on each cam 2 and defining tooth grooves onthe wall supporting surface 4, the fixing effect between each cam 2 andthe wall supporting surface 4 is significantly improved.

Optionally, as shown in FIG. 1 to FIG. 2 , in some embodiments, each camstructure is connected with a connecting cap, and the connecting cap isnested with the connecting rod with a positive tolerance, so that thecam structure can be easily disassembled by hand.

The beneficial effects of the above optional embodiments are as follows:through the connecting cap structure, the cam structure can be processedand produced separately, reducing the production difficulty andmanufacturing cost, and at the same time, it is convenient todisassemble and replace the connecting rod and the cam.

Although the present application has been described in detail above withgeneral descriptions and specific embodiments, some modifications orimprovements can be made thereto on the basis of the presentapplication, which are obvious to those skilled in the art. Therefore,these modifications or improvements made without departing from thespirit of the present application belong to the protection scope of thepresent application.

Terms such as “upper”, “lower”, “left”, “right” and “middle” quoted inthis specification are only for convenience of description and clarity,and are not intended to limit the application scope of the presentapplication. The change or adjustment of the relative relationshipwithout substantively changing the technical content should be regardedas the scope of the present application.

What is claimed is:
 1. An easy-to-disassemble connecting rod with a camstructure, comprising a connecting rod and two cams, wherein two ends ofthe connecting rod are hinged with the two cams, respectively, an outerside surface of each of the two cams comprises an arc surface, a radiusof a curvature of the arc surface of each of the two cams around a shafthole gradually increases, and rotation directions of the two cams areopposite.
 2. The easy-to-disassemble connecting rod with the camstructure according to claim 1, wherein a shaft hole is defined on eachof the two cams, and the two ends of the connecting rod are eachprovided with a rotating shaft, the shaft hole of each of the two camsis correspondingly fitted on the rotating shaft, and each of the twocams is configured to rotate around the corresponding rotating shaft. 3.The easy-to-disassemble connecting rod with the cam structure accordingto claim 1, wherein a distance between an edge point on the arc surfaceof each of the two cams and a center of the shaft hole corresponding tothe arc surface gradually increases.
 4. The easy-to-disassembleconnecting rod with the cam structure according to claim 1, wherein eachof the two cams has an involute shape.
 5. The easy-to-disassembleconnecting rod with the cam structure according to claim 1, wherein thearc surface of each of the two cams is made of a non-slip material. 6.The easy-to-disassemble connecting rod with the cam structure accordingto claim 5, wherein the arc surface of each of the two cams is providedwith a gear surface.
 7. The easy-to-disassemble connecting rod with thecam structure according to claim 6, wherein the gear surface of each ofthe two cams is configured to abut against a wall supporting surface,and the wall supporting surface is provided with tooth grooves adaptedto the gear surface of each of two the cams.
 8. The easy-to-disassembleconnecting rod with the cam structure according to claim 2, wherein therotating shaft is connected with a connecting cap and the connecting capis nested on the connecting rod.